From: Muralidharan Karicheri <m-kariche...@ti.com>
If a USERPTR address that is not aligned to page boundary is passed to the
videobuf_dma_contig_user_get() function, it saves a page aligned address to
the dma_handle. This is not correct. This issue is observed when using USERPTR
IO machism for buffer exchange.
Signed-off-by: Muralidharan Karicheri <m-kariche...@ti.com>
---
Applies to V4L-DVB linux-next branch
drivers/media/video/videobuf-dma-contig.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/media/video/videobuf-dma-contig.c
b/drivers/media/video/videobuf-dma-contig.c
index d25f284..928dfa1 100644
--- a/drivers/media/video/videobuf-dma-contig.c
+++ b/drivers/media/video/videobuf-dma-contig.c
@@ -166,7 +166,8 @@ static int videobuf_dma_contig_user_get(struct
videobuf_dma_contig_memory *mem,
break;
if (pages_done == 0)
- mem->dma_handle = this_pfn << PAGE_SHIFT;
+ mem->dma_handle = (this_pfn << PAGE_SHIFT) +
+ (vb->baddr & ~PAGE_MASK);
else if (this_pfn != (prev_pfn + 1))
ret = -EFAULT;
--
1.6.0.4
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